 /* 清除默认样式 */
 *{padding: 0;margin: 0;}

 .g-footer{
     /* 设置当前div为弹性盒子布局 */
     display: flex; 
     width: 100%;
     height: 70px;
     background-color: #ffffff;

     justify-content: space-around;
     align-items: center;
 }

 .active{
     color: red;
 }